A kind of receiver and its assembly method
Technical field
The present invention relates to electromagnetic receiver field, and in particular to a kind of receiver and its assembly method.
Background technology
Electromagnetic receiver is widely used in the portability electronic equipment such as mobile phone, notebook computer, audiphone.With these just
The fast development of the property taken electronic equipment, people are to its functional micro-telephone receiver part for requiring more and more higher, being applied thereon
Also accordingly rapidly develop.
Electromagnetic receiver part disclosed in Patent No. CN201369820Y is two magnet steel by being mounted opposite vertically
For permanent magnetic field as driving magnetic field, the receiver thickness of such a structure contains the thickness of two blocks of magnet steel, and appearance and size is larger;In addition
Due to being provided with two blocks of magnet steel in cost, compared to the receiver of single magnetic steel structure, magnet steel and the side of assembling are added
Method also increases the fixation of one of magnet steel and the step that magnetizes, therefore production cost is of a relatively high.
Therefore meet frequency response curve can it is up to standard in the case of, using the structure of single magnet steel, can more save and be produced into
Originally, receiver is minimized.
The content of the invention
Therefore, the technical problems to be solved by the invention are the receiver for using two pieces of magnetic steel structures in the prior art
The problem of cost is higher.
Therefore, the present invention provides a kind of receiver, including
Housing, including the first housing and the second housing that can be fastened, the first shell body is interior formed with first chamber, described
Formed with second chamber in second shell body;
The inner chamber is separated into the first chamber and the second chamber by Yin Mo mechanisms, the Yin Mo mechanisms;
Vibrating mechanism, the vibrating mechanism include electromagnet unit and vibration unit;
The electromagnet unit includes armature and the coil being at least wrapped on the armature of part;The vibration unit is
A permanent magnet being arranged in the electromagnet unit magnetic circuit, the permanent magnet are connected with the Yin Mo mechanisms.
Further, the Yin Mo mechanisms include fixed frame, oscillating plate and sound film, and the fixed frame connects with the housing
Connect, one end of the oscillating plate is fixedly connected with the fixed frame, and the sound film is arranged in first cavity and is covered in
The surface of the fixed frame.
Further, the permanent magnet is fixed on the oscillating plate in the second chamber.
Further, the neck being adapted with the permanent magnet, the end of the permanent magnet are provided with the oscillating plate
It is fastened in the neck, fixing end of the neck away from the oscillating plate is set.
Further, the armature is U-shaped armature, and the U-shaped armature includes two symmetrically arranged dismountable first
Elbow unit and the second elbow unit, first, second elbow unit are separately positioned in first, second chamber.
Further, the connecting portion of the first elbow unit and the second elbow unit is fixed with the oscillating plate connects
Connect, the through hole for allowing the connecting portion to pass through is provided with the oscillating plate.
Further, one group of coil is wound with respectively on the first elbow unit and the second elbow unit, when two
Pass through the end generation phase of the first elbow unit and the second elbow unit described in during same alternating current in the group coil
Same magnetic pole.
Further, the permanent magnet be arranged on the first elbow unit and the second elbow unit end it
Between, the magnetic pole of the permanent magnet is relative with the end of the first elbow unit and the second elbow unit respectively.
Further, the connecting portion of the first elbow unit and the second elbow unit is single for the bumps to cooperate
Member.
Further, the end of the first elbow unit forms the dismountable projection relative with the permanent magnet.
The present invention also provides a kind of assembly method of receiver, comprises the following steps:
S1:First elbow unit is fixedly installed in the first cavity, forms the first housing module;
S2:Second elbow unit is fixedly installed in the second cavity, forms the second housing module;
S3:Yin Mo mechanisms are assembled, and permanent magnet is fixedly connected with the Yin Mo mechanisms, form vibration sound film module;
S4:First housing module, vibration sound film module and the second housing module are assembled into fixation successively.
Further, the step S1 also includes:The coil (32) winding is installed on the first elbow unit
(311) on, then the coil (32) and the first elbow unit (311) be fixedly installed in first cavity;
The step S2 also includes:Coil winding is installed on the second elbow unit, then by the coil
And the second elbow unit is fixedly installed in second cavity.
Further, above-mentioned assembly method, the step S3 also include:The one end of the permanent magnet is inserted into vibration
On plate in preset neck, and the insertion end of the permanent magnet is set to be flushed with the surface of the oscillating plate.
Further, the step S4 also includes:By the connection of the first elbow unit and the second elbow unit
Portion passes through the through hole on the oscillating plate so that the concavo-convex unit of the connecting portion is mutually clamped fixation.
Technical scheme provided by the invention, has the following advantages that:
1. receiver provided by the invention, including housing, Yin Mo mechanisms and vibrating mechanism.Wherein housing includes what can be fastened
First housing and the second housing, first shell body are interior interior formed with second chamber formed with first chamber, second shell body;Yin Mo mechanisms
Inner chamber is separated into first chamber and second chamber;Vibrating mechanism includes electromagnet unit and vibration unit, electromagnet unit bag
The coil for including armature and being at least wrapped on the armature of part;Vibration unit is a permanent magnetism being arranged in electromagnet unit magnetic circuit
Body;The permanent magnet is connected with Yin Mo mechanisms.
The receiver of this structure, permanent magnet is connected as vibration unit with Yin Mo mechanisms, in electromagnet unit magnetic circuit,
Yin Mo mechanisms are driven to be vibrated in the presence of alternating magnetic field power caused by coil, and then sounding.Replace holding in the mouth using permanent magnet
Iron is as vibration unit, between permanent magnet is arranged on into two ends of armature, by match magnetic field of permanent magnet size and
The distance between armature, so that the magnetic field force that two ends are acted on permanent magnet is equal in magnitude, namely vibration unit
Driving force by two ends of armature is equal in magnitude.Now, active force of the fixed magnetic field of permanent magnet to two ends of armature
Size is identical so that two ends of armature can not cancel out each other with polarity chron to the active force of permanent magnet, further such that not
Permanent magnet is still between two ends of armature when connecting alternating current, does not produce vibration, so that it is guaranteed that the frequency response of receiver is bent
Line reaches standard.And structure of the armature as vibration unit is used, because the magnetic field of permanent magnet is fixed magnetic field, the moment can be to rank
Iron produces magnetic field force, so two permanent magnets must be symmetrical arranged at the vibration position of armature, and it also requires matching two is forever
The magnetic field size of magnet and its distance with armature chatter position respectively, make it that band polarity chron is not forever at the vibration position of armature
Magnet is cancelled out each other to its active force, just can ensure that the frequency response curve of receiver reaches standard.So make than using armature
For vibration unit, using permanent magnet as vibration unit, a permanent magnet can be set, and then save production cost less.In addition,
Due to only setting a permanent magnet so that the thickness of receiver is thinned, also save the step together permanent magnet being arranged on housing
Suddenly.
2. receiver provided by the invention, Yin Mo mechanisms include fixed frame, oscillating plate and sound film.Fixed frame connects with housing
Connect, one end of oscillating plate is fixedly connected with fixed frame, and sound film is arranged in the first cavity and is covered in the surface of fixed frame;Permanent magnetism
Body is fixed on the oscillating plate in second chamber.
The receiver of such a structure, permanent magnet produce vibration in the presence of electromagnet unit magnetic field force, drive oscillating plate
Vibrate together, because one end of oscillating plate is fixedly connected with fixed frame, form cantilever beam structure, so as to the effect of conduct vibrations
More preferably;Sound film is covered in the surface of fixed frame, and fixed frame is fixedly connected with the casing, so that oscillating plate can be by conduct vibrations
Sound film is given, drives the vibration of sound film, and then agitate air sounding.
3. receiver provided by the invention, the neck being adapted with permanent magnet, the end of permanent magnet are provided with oscillating plate
It is fastened in neck, fixing end of the neck away from oscillating plate is set.The receiver of such a structure, is set on oscillating plate and permanent magnet
The neck being adapted so that the end of permanent magnet is fastened in neck, can accurately control the company between permanent magnet and oscillating plate
Connect thickness, and then the equidistant requirement of accurate two ends for realizing permanent magnet and armature, it is ensured that the frequency response of receiver is bent
Line reaches standard;Fixing end of the neck away from oscillating plate is set, and permanent magnet is then correspondingly arranged at the fixing end away from oscillating plate,
Namely the distal end of cantilever beam structure, being capable of preferably conduction vibration so that oscillating plate has bigger amplitude, improves receiver
Sensitivity.
4. receiver provided by the invention, armature is U-shaped armature, and U-shaped armature is symmetrically arranged dismountable including two
First elbow unit and the second elbow unit, first, second elbow unit are separately positioned in first, second cavity;First arm
The connecting portion of elbow unit and the second elbow unit allows the through hole that passes through of connecting portion in being provided with oscillating plate, on oscillating plate;
Coil is wound with first elbow unit, the second elbow unit, the first elbow when in two groups of coils by same alternating current
The end of unit and the second elbow unit produces identical magnetic pole..
The receiver of this structure, U-shaped armature only need coil is wound on it, it becomes possible to so that caused by two ends
Magnetic field intensity is identical;And U-shaped armature is symmetrically arranged dismountable first elbow unit and the second elbow unit, is set respectively
In modular right angle setting in first, second cavity, can be facilitated, production cost is saved;Connecting portion on oscillating plate, and
The through hole for allowing connecting portion to pass through is provided with oscillating plate, can ensure that alternating magnetic field only transmits in U-shaped armature, so as to avoid
Loss when alternating magnetic field transmits in different magnetic conductive medias;Through hole is opened up on oscillating plate so that the intensity of oscillating plate diminishes,
It is more prone to vibrate under the effect of identical external force, is advantageous to improve the sensitivity of receiver;Coil is wound in the second cavity
On the second interior elbow unit so that the internal face that the first elbow unit in the first cavity can be close to the first housing is set
Put, so as to reduce the thickness needed for receiver, be advantageous to the thinning of receiver.
5. receiver provided by the invention, permanent magnet be arranged on the first elbow unit and the second elbow unit end it
Between, the magnetic pole of permanent magnet is relative with the end of the first elbow unit and the second elbow unit respectively;First elbow unit and second
The connecting portion of elbow unit is the concavo-convex unit to cooperate;The end of first elbow unit forms relative with permanent magnet convex
Rise.
The receiver of this structure, the magnetic pole of the permanent magnet end phase with the first elbow unit and the second elbow unit respectively
It is right so that permanent magnet magnetic field force suffered in alternating magnetic field is most strong, so as to which caused Oscillation Amplitude is maximum, the spirit of receiver
Sensitivity highest;The connecting portion of first elbow unit and the second elbow unit is the concavo-convex unit to cooperate so that both connect
It is even closer, loss of the alternating magnetic field in both connecting portions can be reduced;The end of first elbow unit forms and permanent magnet
Relative projection, can be in the case where first chamber size be certain, it is ensured that permanent magnet and the distance phase of two ends of armature
Deng requirement.
6. the present invention provides a kind of assembly method of receiver, comprise the following steps, the first elbow unit is fixedly mounted
In in the first cavity, the first housing module is formed;Second elbow unit is fixedly installed in the second cavity, forms the second housing
Module;Yin Mo mechanisms are assembled, and permanent magnet is fixedly connected with the Yin Mo mechanisms, form vibration sound film module;By described
One housing module, vibration sound film module and second housing module assemble fixation successively.
The assembly method of this receiver, the first elbow unit and the first housing form the first housing module;Second elbow list
Member and coil and the second housing form the second housing module;Yin Mo mechanisms and the permanent magnet that is arranged on are as vibration sound film mould
Block;Three modules are individually assembled, and three module general assemblies can finally be completed to the assembling process of receiver, to realize using automatic
Change mode assembles receiver, so as to greatly improve the packaging efficiency of receiver, reduces the production cost of receiver.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the longitudinal cross-section schematic diagram of receiver;
Fig. 2 is the top view of Yin Mo mechanisms (sound film is not shown);
Fig. 3 is the decomposing schematic representation of armature;
Description of reference numerals:
1- housings;The housings of 11- first;111- senders;The housings of 12- second;121- sound regulating holes;13- first chambers;14-
Second chamber;
2- Yin Mo mechanisms;21- fixed frames;22- oscillating plates;221- necks;222- through holes;223- through holes;23- sound films;
3- electromagnet units;31- armature;311- the first elbow units;3111- is raised;312- the second elbow units;313-
End;314- connecting portions;32- coils;
4- permanent magnets.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected;Can
To be mechanical connection or electrical connection;Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It is be combined with each other into conflict can.
Embodiment 1
The present embodiment provides a kind of receiver, as shown in figure 1, including housing 1, Yin Mo mechanisms 2, vibrating mechanism.
As shown in figure 1, housing 1 has the first housing 11 formed with first chamber and the second shell formed with second chamber
The composition inner chamber that body 12, the first housing 11 and the second housing 12 can fasten.Inner chamber is separated into the He of first chamber 13 by Yin Mo mechanisms 2
Second chamber 14;Vibrating mechanism includes electromagnet unit 3 and vibration unit;Electromagnet unit 3 includes U-shaped armature 31 and winding
Coil 32 on armature 31;Vibration unit is a permanent magnet 4 being arranged in the magnetic circuit of electromagnet unit 3, and permanent magnet 4 is set
It is placed between two ends 313 of armature 31, and it is identical with the distance of two ends 313, it can be ensured that the frequency response of receiver is bent
Line reaches standard;Permanent magnet 4 is connected with Yin Mo mechanisms 2.
As depicted in figs. 1 and 2, Yin Mo mechanisms 2 be arranged in the inner chamber positioned at the housing 12 of first shell body 11 and second it
Between or Yin Mo mechanisms 2 be fastened in the opening of the first housing 11.Yin Mo mechanisms 2 include fixed frame 21, oscillating plate 22 and sound film
23, fixed frame 21 is connected with housing 1, and oscillating plate 22 is arranged in fixed frame 21 and its one end is fixedly connected with fixed frame 21, separately
One end can free vibration, sound film 23 is arranged in first chamber 13 and is covered in the surface of fixed frame 21, and the covering of sound film 23 is fixed
Frame 21 and its edge is fixedly connected on fixed frame 21, its middle part are fixedly connected with oscillating plate 22;Wherein also set on the first housing 11
The sender 111 for pronunciation is equipped with, the sound regulating hole 121 for tuning is also provided with certain second housing 12.Permanent magnet 4
It is fixed on the oscillating plate 22 in second chamber 14.
As shown in figures 1 and 3, armature 31 is U-shaped armature 31, and U-shaped armature 31 includes two symmetrically arranged dismountable L
The the first elbow unit 311 and the second elbow unit 312 of type, wherein phase on the first elbow unit 311 and the second elbow unit 312
It is corresponding to be provided with connecting portion 314, a U-shaped iron is formed by the way that 314 two elbow units of connecting portion are sliceable, mould can be facilitated
The right angle setting of block;First, second elbow unit 312 is separately positioned in first, second chamber 14, the first elbow unit
311 may pass through oscillating plate 22 with the connecting portion 314 of the second elbow unit 312 is connected, and is accordingly provided with oscillating plate 22
The through hole 222 for allowing connecting portion 314 to pass through.Connecting portion 314 is the concavo-convex unit to cooperate, can cause two elbow units
Connect even closer, reduction electromagnetism loss;One group of coil is wound with respectively on first arm unit 311 and the second elbow unit 312
32, the first elbow unit 311 and the second elbow unit described in when in coil 32 described in two groups by same alternating current
312 end 313 produces identical magnetic pole, to avoid 31 two ends 313 of armature from being respectively acting on 4 two magnetic poles of permanent magnet
Active force cancel out each other;The end 313 of first elbow unit 311 forms the dismountable projection relative with permanent magnet 4
3111, in the case where the size of first chamber 13 is certain, it is ensured that permanent magnet 4 is equal with the distance of two ends 313 of armature 31,
So that oscillating plate realizes optimal vibrational state.
As depicted in figs. 1 and 2, the neck 221 being adapted with permanent magnet 4, the end of permanent magnet 4 are provided with oscillating plate 22
313 are fastened in neck 221, and the insertion end of permanent magnet 4 is no more than the lower surface of oscillating plate 22, due to the first elbow list
Member 311 is fixed with the distance after the fixed installation of the second elbow unit 312 with the upper and lower surface of oscillating plate 22, while permanent magnet 4
Vertical extension is also fixed value, therefore can be avoided directly when setting permanent magnet 4 on oscillating plate 22 by above-mentioned setting, connection
The problem of thickness at place can not be controlled accurately, and then realize the both ends of accurate control permanent magnet 4 and the first elbow unit 311 and the
The distance between two elbow units 312;Fixing end of the neck 221 away from oscillating plate 22 is set, and can improve shaking for oscillating plate 22
Width.It is additionally provided with through hole 223 on oscillating plate 22 simultaneously, settings of through hole 223 can reduce the electromagnetism loss in magnetic field to carry
The amplitude of high vibration plate.
As shown in figure 1, permanent magnet 4 be arranged on the first elbow unit 311 and the second elbow unit 312 end 313 it
Between, the magnetic pole of permanent magnet 4 is relative with the end 313 of the first elbow unit 311 and the second elbow unit 312 respectively, to cause forever
Magnet 4 is by most strong magnetic field force, the amplitude of increase oscillating plate 22.
Receiver voiced process in this embodiment:Under initial state, because armature 31 uses permeability magnetic material to be made, forever
Magnet 4 produces fixed magnetic field, and magnetic field force is all produced to U-shaped 31 two ends 313 of armature, but due to permanent magnet 4 and two ends
313 distance is identical, thus magnetic field force size equidirectional on the contrary, two ends 313 are also to the reaction force of permanent magnet 4
Size equidirectional is on the contrary, cancel out each other so that permanent magnet 4 is in poised state;For example, when two coil twining on armature
Around it is in opposite direction when, if now accessing unidirectional alternating current to two coils 32, in the first elbow unit 311 and second
The both ends of elbow unit 312 produce alternating magnetic field, and the first elbow unit 311 and the second elbow unit 312 and permanent magnet 4 respectively
The magnetic of corresponding end keeps identical, and now two magnetic field intensities of end 313 of U types armature 31 are maximum, with permanent magnet
During 4 fixed magnetic field interaction, if permanent magnet 4 is close to the magnetic pole and the first arm of one end of the first elbow unit 311
The magnetic pole of the end 313 of elbow unit 311 is identical, then the first elbow unit 311 gives 4 one thrust towards permanent magnet 4 of permanent magnet, this
When the second elbow unit 312 give 4 one the second elbow of direction units 312 of permanent magnet suction;In thrust and suction collective effect
Under, permanent magnet 4 vibrates towards the direction of the second elbow unit 312, because permanent magnet 4 is arranged on oscillating plate 22, therefore drives vibration
Plate 22 vibrates, and because sound film 23 is covered in the surface of fixed frame 21, in the vibration processes of oscillating plate 22, drives the vibration of sound film,
And then the air vibration around it is agitated to carry out sounding;Then, the alternating current direction for the alternating source that coil 32 is connected, phase are changed
Instead, when connecting alternating current in opposite direction to two coils 32, the first elbow unit 311 is to 4 one directions of permanent magnet the
The suction of one elbow unit 311, the second elbow unit 312 gives 4 one thrust towards permanent magnet 4 of permanent magnet simultaneously, so as to forever
Magnet 4 is vibrated towards the first elbow unit 311, and then conduct vibrations are agitated into it to sound film 23, sound film 23 by oscillating plate 22
The air vibration of surrounding carrys out sounding.
As interchangeable embodiment, the end 313 of the first elbow unit 311 can also be not provided with and permanent magnet 4
Relative dismountable raised 3111, as long as ensureing that permanent magnet 4 is equal with the distance of two ends 313 of armature 31.
As interchangeable embodiment, permanent magnet 4 can also be arranged on the first elbow unit 311 and the second elbow unit
Position beyond 312 ends 313, such as be arranged between the first elbow unit 311 and the second elbow unit 312 close to connecting portion
314 some position, as long as alternating magnetic field caused by coil 32 is enough to the active force of permanent magnet 4 after connecting AC power
Greatly, it is allowed to produce vibration;Certainly, the magnetic pole of permanent magnet 4 can not also be with the first elbow unit 311 and the second elbow unit
312 end 313 is relative, as long as connecting the fixation magnetic of alternating magnetic field caused by coil 32 and permanent magnet 4 after AC power
Field interactions causes permanent magnet 4 to produce vibration.
As interchangeable embodiment, the first elbow unit 311 also can be directly fixedly connected with the second elbow unit 312
In on oscillating plate 22, now, the connecting portion 314 of the first elbow unit 311 and the second elbow unit 312 can also be phase interworking
The plane of conjunction, oscillating plate 22 use permeability magnetic material, through hole 222 can need not be set on oscillating plate 22,.
As interchangeable embodiment, armature 31 can also be M types armature 31 or two stripe shape ranks be arrangeding in parallel
Iron 31, the fixed magnetic field of alternating magnetic field and permanent magnet 4 interacts caused by the coil 32 that need to only meet to be wrapped on armature 31
Power causes permanent magnet 4 to produce vibration;Armature 31 can also be structure as a whole, if can also be assembled by stem portion, only
Want armature 31 can magnetic conduction.
The neck 221 being adapted with permanent magnet 4 can also be not provided with as interchangeable embodiment, on oscillating plate 22,
Permanent magnet 4 is set directly on oscillating plate 22, and sets the region of permanent magnet 4 being capable of magnetic conduction on oscillating plate 22;Certainly,
Neck 221 can also be set close to the fixing end of oscillating plate 22, as long as alternating magnetic field power is sufficiently large caused by coil 32 so that forever
Magnet 4 produces vibration.
As interchangeable embodiment, permanent magnet 4 can also be connected by connecting rod with oscillating plate 22, as long as realizing forever
Magnet 4 is connected with Yin Mo mechanisms 2.
The present embodiment provides the assembly method of the part receiver in embodiment 1, comprises the following steps:
S1:The winding of coil 32 is installed on the first elbow unit 311, then the elbow unit 311 of coil 32 and first is consolidated
Dingan County forms the first housing module loaded in first chamber 13;
S2:The winding of coil 32 is installed on the second elbow unit 312, then the elbow unit 312 of coil 32 and second is consolidated
Dingan County forms the second housing module loaded in second chamber 14;
S3:Yin Mo mechanisms 2 are assembled, the one end of permanent magnet 4 are inserted in neck 221 preset on oscillating plate 22, and
The insertion end of permanent magnet 4 is flushed with the surface of oscillating plate 22 and form vibration sound film module;
S4:Assembled successively from the bottom to top according to the first housing module, vibration sound film module and the second housing module, wherein pacifying
When filling vibration sound film module, the connecting portion 314 of the first elbow unit 311 and the second elbow unit 312 is passed through on oscillating plate 22
Through hole 222 so that the concavo-convex unit of connecting portion 314 is mutually clamped fixation, finally again by the first housing of the first housing module
11 mutually fasten with the second housing 12 of the second housing module, so as to complete receiver installation.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.